I met Dr. Kamen briefly in passing outside of the VIP tent at the afterparty in ATL in 2005 (or '06?). He was laboriously making his way through a patch of tables on a Segway, and he was moving chairs out of the way (while standing on the Segway) as he went. We offered to help move the chairs, but we never bothered to ask why he was working his way through the patch of tables to begin with... He just seemed like an insanely great guy.
Condolences to all of you who knew him well.
It seems like the world lost something great today.